Use of thermally expandable graphite intercalation compounds for producing fire-protection seals and method for their production

a technology of thermal expansion and graphite, which is applied in the direction of organic chemistry, pigmenting treatment, group 4/14 element organic compounds, etc., can solve the problems of graphite particles breaking and high expansion volume, and achieve the effect of higher expansion rate and volum

Inactive Publication Date: 2004-12-23
HILTI AG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

0060] As is evident from the following examples, the inventive use of the defined thermally expandable graphite intercalation compounds makes possible not only a decrease in the onset temperature, but surprisingly also a simultaneous increase in the expansion volume and the expansion rate in the region of the onset, so that the objective posed above can be accomplished, namely the attainment of the aimed-for expansion of the fire-protection seal already at low temperatures with a clearly higher expa...

Problems solved by technology

The adjustment of these expansion parameters by way of the particle size of the graphite particles, in that larger graphite particles, for example, result in a higher expansion volume, is not suitable, since larger graphite particles can be damaged and broken down more easily than smaller graphite particles under the shear forces occurring during the production of the intumescing fire-protection seal for introducing the fire-prot...

Method used

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  • Use of thermally expandable graphite intercalation compounds for producing fire-protection seals and method for their production
  • Use of thermally expandable graphite intercalation compounds for producing fire-protection seals and method for their production
  • Use of thermally expandable graphite intercalation compounds for producing fire-protection seals and method for their production

Examples

Experimental program
Comparison scheme
Effect test

example 2

[0064] Preparation of the FeCl.sub.3 / nitromethane graphite intermediate intercalation compound (FeCl.sub.3 / nitromethane GIC)

[0065] The graphite intercalation compound, containing the FeCl.sub.3 and nitroethane as intercalate compounds, having with the expansion parameters given in Table 4 and obtained in the manner described, is obtained by the procedure of Example 1, in which, however, nitroethane is used instead of nitromethane.

5 TABLE 4 FeCl.sub.3 / Nitroethane GIC Onset (.degree. C.) 191 Volume or sample weight in / mg 365 Rate in region of onset in % / .degree. C. 9.59 Average coefficient of expansion between 0.07 TMA Onset 1 and T.sub.100 in K.sup.-1

example 3

[0066] Preparation of an FeCl.sub.3 / 1-nitropropane graphite intercalation compound (FeCl.sub.3 / 1-nitropropane GIC)

[0067] The title compound, is obtained by the method of Example 1, in which, however, 1-nitropropane is used as intercalate compound and as solvent. The expansion parameters of this graphite intercalation compound, which were obtained in the manner described above, are given in the following Table 5.

6 TABLE 5 FeCl.sub.3 / 1 Nitropropane GIC Onset (.degree. C.) 233 Volume or sample weight in / mg 134 Rate in region of onset in % / .degree. C. 10.65 Average coefficient of expansion between 0.030 TMA Onset 1 and T.sub.100 in K.sup.-1

example 4

[0068] Preparation of a graphite intercalation compound containing FeCl.sub.3 / nitromethane and sulfuric acid (FeCl.sub.3 / nitromethane / sulfur-ic acid GIC)

[0069] To begin with, 10 g (0.84 moles) of graphite are transferred to a 100 ml round-bottom flask and treated with 1 ml (0.01 mole) of a 30% hydrogen peroxide solution as oxidizing agent and 15 ml of sulfuric acid (95% to 97%) and the mixture is stirred for 3 hours at room temperature. Subsequently, the graphite is washed with water up to a pH of 3 to 4 and dried.

[0070] The H.sub.2SO.sub.4 / H.sub.2O.sub.2 graphite (1 g, 84 mmoles), obtained in the manner described above, is added to a solution of 1.17 g (7.2 mmoles) of anhydrous FeCl.sub.3 in 3 ml of nitromethane and the mixture is stirred for 20 hours at room temperature, then washed with a little nitromethane and dried.

[0071] The FeCl.sub.3 / nitromethane / sulfuric acid graphite intercalation compound, obtained in this way, has the expansion perimeters, which are given in the followi...

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Abstract

The method of at least one thermally expandable graphite intercalation compound, containing A) a least one metal halide of at least one of the elements Fe, Al, Sb, Zn, Y, Cr and Ni and B) at least one nitroalkane of the general formula CH3(CH2)nNO2, in which n is a whole number from 0 to 10, as well as its structural isomers or mixtures, as intumescing, fire-protection additive in polymer matrices for producing intumescing fire-protective seals for through holes, wall bushings and other openings in walls, floors and/or ceilings of buildings, as well as a method for preparing the thermally expandable graphite-intercalation compounds used.

Description

[0001] The object of the present invention is the use of thermally expandable graphite intercalation compounds as intumescing fire-protection additives in polymer matrices for producing intumescing fire protection seals for through holes, wall bushings and other openings in walls, floors and / or ceilings of buildings, as well as to a method for producing the thermally expandable graphite intercalation compounds used.BACKGROUND INFORMATION AND PRIOR ART[0002] For purposes of fire protection, through holes, wall bushings and other openings in walls, floors and / or ceilings of buildings must be provided with fire-protection seals, so as to prevent fire and smoke from spreading out through these openings in the event of a fire. Such fire-protection seals may be used in the form of curable, formless fire-protection compositions or in the form of prefabricated strips, rings, panels and the like, which are introduced into the openings, which are to be sealed off, or with which these openings...

Claims

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Application Information

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IPC IPC(8): C08K9/02C08K9/04C09K21/02C09C1/46C09K3/10C09K21/00C09K21/04C09K21/10C09K21/12
CPCC08K9/02C08K9/04C09C1/46C09K3/10C09K21/10C09K2200/0208C09K2200/06C09K21/00C01P2004/61C01P2004/80
Inventor REINHEIMER, ARNEWENZEL, ANTJEMUENZENBERGER, HERBERT
Owner HILTI AG
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